This article examines the implications of Cartesian Dualism on Immanuel Kant, David Hume, and their influential works, including Hume's Enquiry Concerning Human Understanding. The article examines Hume's enquiry, it's take on the "gap" in Ontology, and Immanuel Kant's revolutionary take on Hume's philosophy that resulted in a shift in modern philosophy. This article contains pictures, links to similar articles, copies of books and ebooks, and even ebook readers.